Padlock



(No Model.) G. H. JOHNSON.

PADLOOK. No. 542,194. Patented July 2, 1895.

'l l/z) 7265565 .continuation of the bolt-spring 5.

UNITED STATES PATENT OFFICE.

CHARLIE HARMON JOHNSON, OF MARSHALL, MINNESOTA.

PADLOCK.

SPECIFICATION forming part of Letters Patent No: 542,194, dated July 2, 1895.

Application filed September 24, 1894. Serial No. 523,931- No model.)

To all whom it may concern:

Be it known that I, CHARLIE HARMON J OHN- SON, a citizen of the United States, residing at Marshall, in the county of Lyon and State of Minnesota, have invented certain new and useful Improvements in Locks, of which the following is a specification.

My invention relates to padlocks; and it consists of an improved lock of this kind, which may be used either as an interesting puzzle or trick lock or for ordinary purposes for which padlocks are applied.

In operating the look a key with a plain ward is used, and the key may be inserted and turned any number of. times in either direction by one'not conversant with the working of the lock without opening it. It therefore forms an interesting puzzle.

By following the instructions for operating it the lock may be opened quickly and with ease and certainty, and it therefore forms a desirable lock for practical purposes.

I shall now proceed to describe the construction and operation of the invention, reference being had to the accompanying drawings, in which Figure 1 is an outside face view of the lock.

Fig. 2 is a similar view with the face-plate removed, showing the hasp or shackle locked; and Figs. 3 and 4am similar views illustrating the operation of unlocking.

In external appearance the lock is similar to an ordinary padlock, the visible parts consisting of a casing 1 and a shackle 2, the latter being pivoted to the casing at 3 in the usual manner. The shackle is locked by means of a bolt 4, which is constantly urged forward by a spring 5. As shown, the spring 5 is attached to the bolt and forms a suitable shank or connection by which it may be operated. The inner end of the bolt is beveled, so that it may be automatically pressed back by the shackle, and when the latter is closed the bolt springs into a recess 6 and looks it. The shackle has a tendency to open, imparted to it by a spring 7, which, as illustrated, is a When the shackle is locked, it is normally in the position shown in Fig. 2; but it is susceptible of being pressed inward slightly, as shown in Fig. 3, for a purpose to be hereinafter expin 10 by the spring.

plained. l/Vithin the casing is a dog 8, provided with a guide-slot 9, through which a fixed pin 10 passes. The dog is normally held in the position shown in Fig. 2 by means of a spring 11, pressing against its upper righthand side, and a stop-pin 12, which prevents the dog from being turned upon its fulcrum- At the lower left side the dog is provided with a tail 13 and at the upper left side with 'a shoulder 14, and between the tail and shoulder there is a recess 15. At the upper right-hand corner the dog is constructed with a beak 16,which is adapted to engage with a projection 17 upon the end of the shackle when the latter is pressed down, and the dog is thrown over by the ward 18 of the key, as shown in Fig. 3.

The operation of my improved lock is as follows: The lock is closed by simply pressing the shackle into the casing until the bolt 4 engages the recess 6. To open the lock the shackle is pressed down and the key turned to the right, as shown by the arrow in Fig. 3. The key engages the shoulder 14 and forces the dog to the right until the beak 16 is engaged by the projection 17 of the shackle. This engagement will be indicated by a slight noise or click, and the dog will be retained in engagement with the projection by the spring 11. It, now, the operator should continue to turn the key to the right, it would engage the tail 13 and again release the dog. Instead of this, as soon as the click is heard, the key should be turned to the left, the dog meanwhile remaining in engagement with the projection 17. On continuing to turn the key to the left the ward ,will engage the tail of the dog and force the the key may be turned in either direction any number of times without withdrawing the bolt and releasing the shackle. Furthermore, if the pressure on the shackle be relieved after the dog has engaged it, but before the key has beenturned to the left to engage the tail of the dog, the dog will be released and will be thrown to its normal position by the spring 11.

It will be evident that the construction, arrangement, and configuration of the various parts of my improved lock may be more or less varied without departing from the spirit and scope of the invention, and therefore I do not regard myself as limited to the precise construction and arrangement of parts shown and described.

\Vhat I claim, and desire to secure by Letters Patent, is-

1. In a lock the combination with a shackle or part to be locked, and a bolt for locking said shackle, of a dog, adapted, first, to be projected into engagement with the shackle on movement of the key in one direction and, secondly, to be projected into engagement with the bolt to withdraw the latter from the shackle by movement of the key in the opposite direction, substantially as described.

2. The combination with the shackle or part to be locked, and the bolt adapted to engage the shackle, of the dog having a beak adapted to engage the shackle, a part for moving the bolt, a shoulder adapted to be engaged by the key to throw the beak into engagement with the shackle, and a tail adapted to be engaged by the key only when the beak is in engagement with the shackle, whereby a second movement is imparted to the dog to release the shackle, substantially as described.

3. In alock the combination with the shackle or part to be locked provided with a recess to receive a bolt and a projection on its looking extremity, and a spring for opening the shackle, said shackle being susceptible of slight inward movement when it is locked, of a dog provided with a slot and mounted upon a fixed fulcrum pin, a tail upon the dog and a spring and stop pin arranged to normally hold the tail out of the path of the key Ward, ashoulderupon the dog normally in the path of the key ward, and a beak upon the dog adapted to engage the projection of the 5 shackle when the latter is pressed inward, whereby when the shackle is pressed inward and the key is turned in one direction the beak engages the shackle and the tail is thrown into the path of the key ward and when the key is turned in the opposite direction the ward engages the tail of the dog and moves thelatter to withdraw the bolt and release the shackle, substantially as described.

In testimony whereof I aflix my signature in presence of two Witnesses.

CHARLIE HARMON- JOHNSON. lVitnesses:

M. A, JOHNSON, V. B. SEWARD. 

